39x39x9mmHole Size: 20x2mmSold IndividuallyZinc plated with 99.9% sterling silverUse 1 Length 20mm FLAT Cord OR 2 Lengths of 10mm or 4 Lengths of 5mm FLAT Cord or a mix of the two sizes Do NOT pinch the slider down it will break. We recomend wire wrapping or glue to hold in place.